Switch.



O. E. MCCOY.

swnca. APPLICATION FILED APR-13, 1912.

Patented VMay 4, 1915.

lil)

ile

cnrs n. necoiz,

on nemmeno, MARYLAND.

SWETCH.

Specification of Letters Patent.

Patenten May a, icio.

.Application ed April 13, 1912. Serial No. 690,609.

To all whom it may concern Be it known that l, Oris E. McCoy, a' citizen of the United States of America, re-

siding at Baltimore, in the State of Maryland, have invented new and useul lmprovements in Switches, o which the fol-l lowing is a specification.

This invention -Ai'elates to improvements lin switches for opening and closing electric circuits and has particularV application to a switch or'use in conjunction with the instruments of Wireless systems.

in carrying out the present invention, it

is my purpose to provide a switch or" thisv type whereby the sending `and receiving instruments may be connected to and disconnected from the aerial at will, according to Whichinstrument it is desired to utilize.

Furthermore, l aim to provide a switch which shall include a horizontal base board carrying the terminal contacts of the circuits and having pivotally mounted thereon a plurality of switch blades adapted to engage the terminal contacts to close such circuits, each blade consisting of relatively an gulararms and movable in a plane parallel ,to that of the base board so that when one of theinstruments is connected in its respective circuit, the other instrument will Kbe cut out of its circuit.

Another purpose of my invention is the provision of a switch.which'shall include ua base board carrying terminal contacts, and switch blades pivotallv mounted upon the baseboard and movable in a plane parallel with that of such board, the pivoted portion of each. blade being split and having an aperture.contiguous the split portion to receive the pivot pin or screw so that sub- :sequent to the application of the blade tothe pivot screw, the arms thereof 'may be bent angularlj," relatively to cach other and locked to the pivot, the walls of the split `portion serving to'lock the blade in its applied position.

My invention also involves the provisior of a switch and a novel form of terminal Contact therefor, such contact being stamped from a single sheet of metal and formed to provide a contact for the switch blade and a terminal receiving member for the con-I ductor of the electric current.

llfith the above and other vobjects in view,

the invention consist in the construction, combination and arrangement of parts hereinafter set forth in and falling wit-hin the scope of the appended claims.

In the accompanying drawing; Figure l is a top plan view of a single pole double throw switch to be hereinafter disclosed. Fig. 2 is a central longitudinal sectional view of the same. Fig. 3 is a detail view of a Contact. parts being in section and other parts in elevation. Fig. Ll is a iragrnentary plan view of a xn'odiiied form of switch blade. Fig. 5 is a detail sectional view on the line 5 5 of Fig. l.

Similar reference characters designate like parts. throughout the several` views.

Referring now to the accompanying draw .ing in detail, my improved switch, as

shown, embraces a base board l of subst-.intially rectangular outline and constructed of suitable insulating material.

Mounted upon the base board l and sccured thereto adjacent the. opposite` side edges thereoi` are pairs ot`- coperatingT contacts Q, 3. and l. l spared suitable distances apart and adapted to 'facilitate the Closing of the circuits to the respective instruments oi the. system in which the switch is installed.

1fach contact of the pairs L). 3 and l, coniprises u single strip of lnctal. :is shown in Fig. 3. bent upon itself intermediate its ends as at 5 to 'forni arms (i and 7. rlfhe arin 7 is bent intermediate its length to form a substantiallv curved port-ion 8 and has itslfree extremity El arranged parallel vri-th the nain bodv portion of the arm T and spaced therefrom to provide a switch blade receiving contact. the blade boingT adapted tov enter the spacebetween the arm '7 and its free eX- trmity f) to close thc circuit. The arni 6' is bifurcated to provide yspaced parallel limbs l0, 10 converging toward each other at their free ends as at ll. ll and the por tion of the material between the. limbs lll, 1.0 is bent downwardly as at l2 thence up wardly as at i3 to provide a spring tongue and coperating with the limbs lll, l0 to hold the terminal a of a conductor, the clamping action produced between the tongue l2 and limbs l0, l) serving to Secure'lyv hold the conductor terminaltto the contact.

i 'llheupivardly 'extending portion ofthe,

siring tongue lfi terminates in a manipulan infr finger il adapted to be depressed b v the thumb of an operator, the torelinger ci such lid operator beingA held against the under surface of the converging extremities 11, 11 of the llimbs 10, 10 so that upon a pressure being exerted upon the finger 14', the spring tongue will be disengaged from the wire' "ate the arm 7 and its free extremity 9 of such contacts 3 are switch blades 16, 16 each of which` is bent intermediate its ends to provide relatively angular arms 17 and 18 and at the juncture of such arms is provided an aperture adapted to receive a pivot pin or screw 19 passed through the contact 3. It will of course be understood that tlie opposite contacts of each pair have their blade receiving extremities disposed in the same direction so thatin the movement of the switch blades 16 the contact engaging portions thereof will enter the coipeiating contacts ot' the respective pair.

The free extremities of the arms 18 of the blades 16 are projected beyond the contacts 4, l and are pivotally connected to a manipulating member composed of a block 20 constructed of suitable insulating material and provided with a handle 2l. rIlie block 20, at one side ot itspivotal connection with each blade 16 is provided with a beveled .recess 22 designed to accommodate. the proximate ends of the blades in the movement of the latter to open one circuit and close the other.

The operation of the switch Aj ust described, may be briefly stated as follows: For the purpose of illustration, let it be assumedV that one contact of the pair 3 is connected to the aerial and the opposite contact of such'pair grounded. lSimilarly, the contacts of the pair 2 connected to the receiving instrument and contacts of 'the pair 4 to the transmittingr` instrument. Thus, in the position 'of the switch shown in Fig. 1, a circuit is completed from' the ground to the respective contact of the pair 3, the arrn 18 of the adjacent switch blade, one contact of the pair 4, through the transmitting instrument, the opposite contact of the pair Je, arm 18 of the opposite blade 16, thence by wayof the other contact of the pair il through the aerial. ()11 the contrary, should the switch be `thrown from the position shown in Fig. l to engage the free extremities of the arms 17 ofthe blades 16y with the contacts of the pair 2, the circuits through the contactsl of the pali- 4 will be broken owing to the angular position of the arms, and the circuit completed to the receiving instrument of the system, as will be obvious.

In the modified form of the switch blade disclosed in Fig. 4, each blade `in this instance is formed of a single strip of met-al and provided intermediate its length with a split portion 23 and contiguous such split portion is formed with an aperture 24 adapted to receive `the pivot pin 19. Thus, the blade may be applied to lts respective pivot pin through the medium of the slot .23 and upon such pin entering the opening 24, the blade is bent upon itself so that the walls of the slot 23 move toward each other to contract the split portion and thereby lock the blade to the pivot pin.

From the foregoing description taken in connection with the accompanying drawing, `the construction and manner of employing my invention will be readily understood by those Skilled in the art and therefore, a further detail description of the same is thought to be unnecessary.

I claim:

l. A device of the kind described comprising a resilient sheet metal strip, said strip composed of a deflected portion forming at one end a switch-receiving contact, a shank extending in an opposite direction to said deflected portion, and a central slit portion formed on said shank, said slit portion consisting of a part deflected outwardly of one side of said shank, of an integral part extending into projecting position relatively to the opposite side of said shank, and of a finger portion formed terminally upon said last named projecting part. i

2. A device of the kind described comprising a. resilient metalstrip, said strip consisting of an intermediate return portion contacting its body, 'said body and return portion having a curved-around part terminating in stem disposed parallel over said. return portion, said strip also consisting of a shank extending in an opposite direction rela-tively to saidv return. portion, said shank consisting of tivo parallel limbs having terminal inturned contacting portions, of a central portion deflected outwardly of 'one 'side of said shank, of an' integral part extending angularly of Said deflected portion and into projecting position relatively to the opposite side of said shank, and an in'- tegral finger portion l-forlned terminally upon said projecting portion and disposed parallel to said limbs. A

In testimony whereof I aliix my signature in presence of two witnesses.

OTIS E. ,McCOYp Witnesses:

JAMES W. MEADE, RICHARD E. MEADE. 

